MODIFICATION OF CELLULOSE-ACETATE - ITS CHARACTERIZATION AND APPLICATION AS AN ULTRAFILTRATION MEMBRANE

The development of cellulose acetate blend membranes using a commercia l grade Mycell cellulose acetate and cellulose diacetate with suitable pore structure is discussed. These membranes were characterized in te rms of resistance of the membrane, pure water flux, the molecular weig ht cutoff, water content, pore size, and porosity. The removal of copp er metal ions by this blend membrane using polyethyleneimine as a chel ating agent was studied. The effects of copper ion concentration and c asting solution composition on separation are also discussed. A possib le correlation between feed and permeate concentration of copper ion i s evaluated. (C) 1998 John Wiley & Sons, Inc.